High-efficiency mining method of dragline saw-tooth type working bench

Abstract

The embodiment of the invention discloses a high-efficiency mining method of a dragline saw-tooth type working bench, which relates to the technical field of open coal mining and can improve the operating efficiency of draglines. The high-efficiency mining method of a dragline saw-tooth type working bench comprises the steps of: carrying out pin-point blasting on solid rock steps above a coal seam to form a blasting muck pile; leveling and stripping the blasting muck pile by joint operation of push dozers, single-bucket excavators and trucks to form a dragline working bench of a predetermined height, forming a saw-tooth type wharf by extension on the edge of one side of the dragline working bench near the dumping site; when not less than one saw-tooth type wharf is formed by extension on the edge of one side of the dragline working bench near the dumping site, driving the dragline into the ditch to the working area; and driving the dragline in a predetermined traveling line sequentially through the saw-tooth wharf inside bench and the saw-tooth wharf to carry out casting operation. The high-efficiency mining method of a dragline saw-tooth type working bench is suitable for open coal mining by a dragline casting process without transportation.

Description

technical field [0001] The invention relates to the technical field of open-pit coal mining, in particular to a high-efficiency mining method for a dragline zigzag working flat plate. Background technique [0002] The main operation process of applying non-transportation stacking process in domestic open-pit coal mines is as follows: [0003] (1) Pre-throw blasting of solid high steps to form a blast pile; [0004] (2) Bulldozers, single buckets, and trucks assist the stripping part to explode, and expand and level the flat plate; [0005] (3) The dragline stands on the flat plate for stacking operations. [0006] In the application of the domestic non-transportation stacking process, the dragline usually stands on a rectangular flat plate jointly constructed by bulldozers, single-bucket excavators, and trucks for stacking operations. This kind of no-transport stacking process layout and operation flat plate design method mainly has the following problems in field practic...

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Problems solved by technology

This kind of non-transportation stacking process layout method and the operation flat plate design method mainly have the following problems in field practice: (1). The rectangular design of the dragline operation flat plate concentrates too much material in the coal ditch, It not only increases the workload of single-bucket excavators and trucks, but also increases the amount of secondary stacking during the stripping link of the dragline, which indirectly reduces the effective stacking efficiency of the dragline; (2). In order to effectively utilize the single-machine operation capacity of the dragline, it is necessary to ensure a certain height requirement for the operation platform. The rectangular design will inevitably limit the width of the operation platform, so that the dragline operation position is far away from the dump site. , Inverting distance restricts the working efficiency of the dragline

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